Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
phan lap » phan dau
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
truc va » thuc va, thuc vat, trung va
nang ho » nang hoc, nang co, tang ho
ty nang » ky nang, ty xang, ty hang
tu sach » thu sach, su sach, te sach
ho hoi » hoc hoi, hoa hoi, hoi hoi
lap su » lap du, lap tu, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang ho hoi. hieu ve cham ((truc va) or (thuc dan)) phan lap su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ho hoi. hieu ve cham ((truc va) OR (thuc dan)) phan lap su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ho hoi. hieu ve cham ((truc va) or (thuc dan)) phan lap su triet*.