Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
cac tren » cau tren, rac tren, tac tren
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
ca tren » cau tren, cu tren, la tren
luc va » duc va, tuc va, loc va

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 (thu hoach)) ky nang xa hoi. hieu van cam luc va thanh tai ((cac tren) OR (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky nang xa hoi. hieu van cam luc va thanh tai ((cac tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu hoach)) ky nang xa hoi. hieu van cam luc va thanh tai ((cac tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ky nang xa hoi. hieu van cam luc va thanh tai ((cac tren) OR (ca tren))*.