Perhaps you should try some spelling variations:
thi hoang » thai hoang, thi hong, thi hoan
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
thi hang » thi hanh, thi nang, thi hong
nhan luc » nang luc
hieu van » hieu va, thien van, lieu va
te sach » toc sach
hac luc » than luc
cua te » cua tu

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 ((thi hoang) or (thi hang)) xa hoi. hieu van ((hac luc) or (nhan luc)) va thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thi hoang) OR (thi hang)) xa hoi. hieu van ((hac luc) OR (nhan luc)) va thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ((thi hoang) or (thi hang)) xa hoi. hieu van ((hac luc) or (nhan luc)) va thanh dai cua te*.