Perhaps you should try some spelling variations:
nganh duoc » nganh suc
thien van » thi van
nang duoc » ngang duoc, nang doc, nang luc
xa thanh » va thanh, ha thanh, ta thanh
lam tuc » lam thuoc, lam truoc, luat tuc
tu sach » thu sach, su sach, te sach
van lam » van nam
sach ky » sac ky, sach y, sach ty
vi va » vi van, vai va, bi va
vu va » vu van, tu va, su va
thiet » thieu

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 ky ((nang duoc) or (nganh duoc)) hoi. thien van lam tuc xa thanh ((vi va) OR (vu va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang duoc) OR (nganh duoc)) hoi. thien van lam tuc xa thanh ((vi va) OR (vu va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang duoc) or (nganh duoc)) hoi. thien van lam tuc xa thanh ((vi va) OR (vu va)) thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang duoc) or (nganh duoc)) hoi. thien van lam tuc xa thanh ((vi va) OR (vu va)) thiet*.