Perhaps you should try some spelling variations:
van hoang » quan hoang, tran hoang, tuan hoang
va triet » va thiet, va trien, ve triet
thi nang » thi cong, ki nang
van hoan » van hoa, van toan, van han
thi hanh » thi thanh
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
di va » dai va, di vao, doi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((thi nang) OR (thi hanh)) xa hoi. hieu va cam tuc ((van hoang) or (van hoan)) di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thi nang) OR (thi hanh)) xa hoi. hieu va cam tuc ((van hoang) OR (van hoan)) di va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thi nang) OR (thi hanh)) xa hoi. hieu va cam tuc ((van hoang) or (van hoan)) di va triet*".