Perhaps you should try some spelling variations:
thien van » thi van
nam truc » nam truoc, nam thuc, nam trung
su sach » vu sach
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ly nang xa hoi. ((hieu va) or (thien van)) nam truc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly nang xa hoi. ((hieu va) OR (thien van)) nam truc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ly nang xa hoi. ((hieu va) or (thien van)) nam truc va hanh vi cuu tre*.