Perhaps you should try some spelling variations:
khang tiet » thang tien, hang tieu, hang tien
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
tiet cua » tiep cua, tien cua, biet cua
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

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 tiet 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 tiet 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 tiet cua triet*.