Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
thu sach » thuat sach, thuoc sach, thu hoach
cham tuc » nham thuc, pham thuc, tham thuc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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) or (thu sach)) ly nang xa hoi. ((hieu van) or (lieu va)) cham tuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang xa hoi. ((hieu van) OR (lieu va)) cham tuc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ly nang xa hoi. ((hieu van) or (lieu va)) cham tuc va hanh di cua tre*.