Perhaps you should try some spelling variations:
khanh dai » thanh dat, khanh van, phan dai
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
xa khanh » xa thanh, van khanh, dat khanh
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
ca viet » va viet, co viet, hoa viet
ma hoi » mai hoi, xa hoi, ma hoa
dai ca » dai cua, dai va, bai ca

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 (thu sach)) ky nang ma hoi. hieu van cam tuc xa khanh dai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu van cam tuc xa khanh dai ca viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ma hoi. hieu van cam tuc xa khanh dai ca viet*.