Perhaps you should try some spelling variations:
tay dong » tac dong, day dong, tay cong
dong van » duong van, dang van, dong von
nang tai » hang tai, tang tai, sang tai
cuc tieu » muc tieu, cac tieu, cach tieu
tu xach » tu cach, tu hach
tu sach » thu sach, su sach, te sach
van hoi » van hoa, van hoc, van hoe
cac duc » cac du, cao duc, cac dac
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu xach) OR (tu sach)) tay dong van hoi. lieu va cac duc va nang tai ((cuc thue) or (cuc tieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu xach) OR (tu sach)) tay dong van hoi. lieu va cac duc va nang tai ((cuc thue) OR (cuc tieu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu xach) OR (tu sach)) tay dong van hoi. lieu va cac duc va nang tai ((cuc thue) or (cuc tieu))*".