Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham truc » cau truc, nham thuc, pham thuc
phan lam » phang lam, phan lap, phan lan
hieu ve » hieu va, hieu van
lam cua » nam cua, lam chat
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 su » hieu sau, tieu su, hieu so
hoi hoi » hoi hoc, hoi doi, doi hoi
hoc hoi » hoc khoi, hoc hoa, hoc noi
ty nang » ky nang, ty xang, ty hang

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 ((hoc hoi) or (hoi hoi)). ((hieu su) or (hieu ve)) cham truc va phan lam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((hoc hoi) OR (hoi hoi)). ((hieu su) OR (hieu ve)) cham truc va phan lam cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((hoc hoi) or (hoi hoi)). ((hieu su) or (hieu ve)) cham truc va phan lam cua triet*.