Perhaps you should try some spelling variations:
kham thuc » nham thuc, pham thuc, tham thuc
cua triet » su triet, va triet
ve triet » va trien, su triet
cua viet » ca viet, hoa viet, cua vat
phan lap » phan dau
va phan » van phan, va phat, va phap
te sach » toc sach
sach ty » sach y, sach tu, sach thu
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
nang ho » nang hoc, nang co, tang ho
ty nang » ky nang, ty xang, ty hang
thuc va » thuc vat, thuc dan, thuc day
ho hoi » hoc hoi, hoa hoi, hoi hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ho hoi. hieu vu kham thuc va phan lap ((((cua triet) OR (cua viet))) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ho hoi. hieu vu kham thuc va phan lap ((((cua triet) OR (cua viet))) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ho hoi. hieu vu kham thuc va phan lap ((((cua triet) OR (cua viet))) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ho hoi. hieu vu kham thuc va phan lap ((((cua triet) OR (cua viet))) or (ve triet))*.