Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
xa thanh » ha thanh, ta thanh, gia thanh
va thanh » gia thanh, ban thanh, va tinh
vinh cau » sinh cau, vinh cuu, minh cau
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
y nang » ky nang, ly nang, v nang

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 x ho. hieu van lam tuc ((xa thanh) OR (va thanh)) vinh cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) y nang x ho. hieu van lam tuc ((xa thanh) OR (va thanh)) vinh cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) y nang x ho. hieu van lam tuc ((xa thanh) OR (va thanh)) vinh cau treo".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) y nang x ho. hieu van lam tuc ((xa thanh) OR (va thanh)) vinh cau treo*.