Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tu sach » thu sach, su sach, te sach
lang ca » lang cua, lang cao, hang ca
thi van » thi lan, thi hanh, thi nang
tai van » thai van, tai san, tai ban
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ca cuu » cap cuu, cua cuu, ca cua
ve lam » va lam, de lam, se lam

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) or (thuat sach)) y nang ma hoa. hieu ve lam ((tai van) OR (thi van)) lang ca cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) y nang ma hoa. hieu ve lam ((tai van) OR (thi van)) lang ca cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) y nang ma hoa. hieu ve lam ((tai van) OR (thi van)) lang ca cuu tre*".