Perhaps you should try some spelling variations:
dan khang » van khang, dan khanh, dao khang
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
hieu van » hieu va, thien van, lieu va
hau thuc » huu thuc, ha thuc, mau thuc
thuc dan » thuc hanh, hoc dan, thuc vat
khang te » khang tiet, hang tu, khang a
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van hau » van ha, van hai, van dau
ma hoi » mai hoi, xa hoi, ma hoa
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (vu khach)) ky nang ma hoi. hieu van hau thuc dan khang te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu khach)) ky nang ma hoi. hieu van hau thuc dan khang te cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khach)) ky nang ma hoi. hieu van hau thuc dan khang te cua triet*.