Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
khang te » khang tiet, hang tu, khang a
va khang » van khang, va hang, va khong
thuc va » thuc vat, thuc dan, thuc day
van hau » van ha, van hai, van dau
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
van cau » van dau, van chat, toan cau
ma hoi » mai hoi, xa hoi, ma hoa
te su » ve su, te du, de su

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 sach)) ky nang ma hoi. hieu ((van cau) or (van hau)) thuc va khang te su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang ma hoi. hieu ((van cau) OR (van hau)) thuc va khang te su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang ma hoi. hieu ((van cau) or (van hau)) thuc va khang te su triet*.