Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thu sach » tu sach, thuat sach, thuoc sach
cham tuc » pham thuc, tham thuc, cham soc
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
hieu vu » hieu va, hieu ve, hieu su
va hanh » van hanh, va thanh, va danh
vai va » mai va, dai va, hai va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang cao hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh vai va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang cao hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh vai va thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang cao hoi. hieu vu ((cham tuc) OR (nham thuc)) va hanh vai va thiet*.