Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
cham tuc » nham thuc, pham thuc, tham thuc
hanh lai » hanh lam, hanh tai, thanh lap
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
xa hanh » xa thanh, xa khanh, va hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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) or (thuat sach)) ky nang xa hoi. ((hieu va) OR (lieu va)) cham tuc xa hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang xa hoi. ((hieu va) OR (lieu va)) cham tuc xa hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) ky nang xa hoi. ((hieu va) OR (lieu va)) cham tuc xa hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ky nang xa hoi. ((hieu va) OR (lieu va)) cham tuc xa hanh lai cua tre*.