Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
vu khach » vu khanh, vu khac, vay khach
hieu va » lieu va, hieu qua
tinh va » tich va, trinh van, trinh vat
xa tinh » va tinh, ha tinh, ca tinh
coc tuc » coc luc, hoc thuc, doc thuc
vu sach » vu bach, su sach
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu khach)) ky lang xa hoi. ((hieu ve) or (hieu va)) coc tuc xa tinh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky lang xa hoi. ((hieu ve) OR (hieu va)) coc tuc xa tinh va va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky lang xa hoi. ((hieu ve) or (hieu va)) coc tuc xa tinh va va triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ky lang xa hoi. ((hieu ve) or (hieu va)) coc tuc xa tinh va va triet*.