Perhaps you should try some spelling variations:
chet nuoc » chet duoc, che duoc, chua nuoc
thanh hai » thanh phan, thanh hoa, thanh san
cau tren » cu tren, dau tren, ca tren
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cua tre, cau treo
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
ve chet » ve chat, ve che, se chet

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 (su sach)) ky nang xa hoi. hieu ve chet nuoc va thanh hai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu ve chet nuoc va thanh hai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu ve chet nuoc va thanh hai ((cuu tre) or (cau tren))*.