Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
va trinh » van trinh, va tinh, lap trinh
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, dua tren
ve cau » ke cau, va cau, ve cac

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 hoi. hieu ve cau truc va trinh van ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky tang xa hoi. hieu ve cau truc va trinh van ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu khach ky tang xa hoi. hieu ve cau truc va trinh van ((cua tre) or (cua triet))*.