Perhaps you should try some spelling variations:
canh tay » canh tac, thanh tay, anh ta
pham huu » pham duc, pham duy, phan huy
va hanh » van hanh, va thanh, va danh
sanh ty » sach ty
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
huu va » cuu va, tuu va
lam ca » lam cua, lam cha, lam ha
lam co » nam co

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sanh ty) or (canh tay)) nang ma hoi. hieu va pham huu va hanh ((lam ca) OR (lam co)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh ty) OR (canh tay)) nang ma hoi. hieu va pham huu va hanh ((lam ca) OR (lam co)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sanh ty) or (canh tay)) nang ma hoi. hieu va pham huu va hanh ((lam ca) OR (lam co)) viet".
• Adding a wildcard symbol may retrieve word variants: so ((sanh ty) or (canh tay)) nang ma hoi. hieu va pham huu va hanh ((lam ca) OR (lam co)) viet*.