Perhaps you should try some spelling variations:
sanh thieu » sach thieu, thanh thieu, hanh thiet
thieu nang » thien nang, thieu khang, thieu quang
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
ma hoi » mai hoi, xa hoi, ma hoa
pha va » pham va, phap va, phan va
cua te » cua tu

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 thieu nang ma hoi. ((hieu van) OR (hieu va)) kham pha va hanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh thieu nang ma hoi. ((hieu van) OR (hieu va)) kham pha va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh thieu nang ma hoi. ((hieu van) OR (hieu va)) kham pha va hanh vai cua te*.