Perhaps you should try some spelling variations:
khach ky » thanh ky
tinh voi » trinh voi, tinh doi, binh voi
cac thoi » cac toi, cac hop, cac tro
hieu van » hieu va, thien van, lieu va
voi cuu » voi cuoc
va tinh » may tinh
cac tuc » cac toc, cac tu, cac tac
tang xa » trang xa, tang ma, lang xa
hanh ky » hanh kem
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((khach ky) OR (hanh ky)) tang xa hoi. hieu van ((cac tuc) or (cac thoi)) va tinh voi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((khach ky) OR (hanh ky)) tang xa hoi. hieu van ((cac tuc) OR (cac thoi)) va tinh voi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((khach ky) OR (hanh ky)) tang xa hoi. hieu van ((cac tuc) or (cac thoi)) va tinh voi cuu tre*".