Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
cham duc » pham duc, cham soc, pham duy
thu nang » thi nang, thu bang, tho nang
dua tren » dung tren
thu hang » thi hang, thuc hanh, thu huong
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tai hai » thi hai, dai hai, tai ha
cuu tre » cua tre, cau tren, cau treo

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 ((thu nang) OR (thu hang)) tai hai. hieu vu cham duc va thanh lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thu hang)) tai hai. hieu vu cham duc va thanh lai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu nang) OR (thu hang)) tai hai. hieu vu cham duc va thanh lai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) OR (thu hang)) tai hai. hieu vu cham duc va thanh lai ((dua tren) or (cuu tre))*.