Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
chat xuc » chat huu, cam xuc, chao xu
doc sach » hoc sach, toc sach, nuoc sach
thi hang » thi hanh, thi nang, thi hong
hanh hai » thanh hai, nhanh hai, hang hai
hai cau » hai chau, hai chu, hai hau
va hanh » van hanh, va thanh, va danh
te sach » toc sach
hang xa » hoang xa, hang va, hang ca
ca xuc » cam xuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (doc sach)) thi hang xa hoi. hieu qua ((ca xuc) OR (chat xuc)) va hanh hai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) thi hang xa hoi. hieu qua ((ca xuc) OR (chat xuc)) va hanh hai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) thi hang xa hoi. hieu qua ((ca xuc) OR (chat xuc)) va hanh hai cau tren".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) thi hang xa hoi. hieu qua ((ca xuc) OR (chat xuc)) va hanh hai cau tren*.