Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
soc van » hoc van, oc van, sac van
hanh de » hanh ve, hanh kem
cua tuc » cua duc, cua tu, cua thuoc
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thieu ((nang xa) OR (lang xa)) hoi. ((hieu va) or (lieu va)) cham soc van hanh de cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thieu ((nang xa) OR (lang xa)) hoi. ((hieu va) OR (lieu va)) cham soc van hanh de cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thieu ((nang xa) OR (lang xa)) hoi. ((hieu va) or (lieu va)) cham soc van hanh de cua tuc".
• Adding a wildcard symbol may retrieve word variants: te sach thieu ((nang xa) OR (lang xa)) hoi. ((hieu va) or (lieu va)) cham soc van hanh de cua tuc*.