Perhaps you should try some spelling variations:
thien van » thi van
va hanh » van hanh, va thanh, va danh
lam duc » lam duoc, pham duc, nam duoc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
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: thu ((sach ty) or (cach tu)) nang xa hoi. ((hieu va) or (thien van)) lam duc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (cach tu)) nang xa hoi. ((hieu va) OR (thien van)) lam duc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (cach tu)) nang xa hoi. ((hieu va) or (thien van)) lam duc va hanh vi cuu tre*.