Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
su triet » su viet, ve triet
phan lap » phan dau
va phan » van phan, va phat, va phap
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty nang » ty xang, ty hang, ly nang
su tien » su kien, su hien, tu tieng
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: tu sach ((ty nang) or (ky nang)) ho hoi. hieu vu cham truc va phan lap ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) ho hoi. hieu vu cham truc va phan lap ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ky nang)) ho hoi. hieu vu cham truc va phan lap ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) ho hoi. hieu vu cham truc va phan lap ((su triet) OR (su tien))*.