Perhaps you should try some spelling variations:
tham luc » than luc, tham nuoc, tham thuc
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
cua tre » cua te, cuu tre, cua triet
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
luc va » duc va, tuc va, loc va
bao ky » ban ky, bac ky, bo ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((bao ky) OR (cao ky)) tang xa hoi. hieu va tham luc va ((hanh tai) or (hang tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((bao ky) OR (cao ky)) tang xa hoi. hieu va tham luc va ((hanh tai) OR (hang tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((bao ky) OR (cao ky)) tang xa hoi. hieu va tham luc va ((hanh tai) or (hang tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((bao ky) OR (cao ky)) tang xa hoi. hieu va tham luc va ((hanh tai) or (hang tai)) cua tre*.