Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hieu van » hieu va, thien van, lieu va
cac thoi » cac toi, cac hop, cac tro
khach ky » hanh ky, thanh ky
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cac tac » cac toc, cac bac, cac dac
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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 ((tang xa) OR (tang ma)) hoi. hieu van ((cac tac) or (cac thoi)) va tinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky ((tang xa) OR (tang ma)) hoi. hieu van ((cac tac) OR (cac thoi)) va tinh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky ((tang xa) OR (tang ma)) hoi. hieu van ((cac tac) or (cac thoi)) va tinh vi cuu tre*".