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