Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
su triet » su viet, su tien, ve triet
phan lap » phan dau
hieu ve » hieu va, hieu van
va phan » van phan, va phat, va phap
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu vu » hieu va, hieu su, dieu vu
hoc hoi » hoc khoi, hoc hoa, hoc noi
hoi hoi » hoi hoc, hoi doi, doi hoi
ty nang » ky nang, ty xang, ty hang
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 ((hoi hoi) or (hoc hoi)). ((hieu vu) or (hieu ve)) cham truc va phan lap su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((hoi hoi) OR (hoc hoi)). ((hieu vu) OR (hieu ve)) cham truc va phan lap su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((hoi hoi) or (hoc hoi)). ((hieu vu) or (hieu ve)) cham truc va phan lap su triet*.