Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cham xuc » chat xuc, cham soc, pham duc
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
va nang » van nang, da nang, cam nang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tu sach » su sach, te sach, tu cach
di dau » doi dau, bi dau, di du

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